<template>
  <view>
    <view class="goods-list">
      <view v-for="(item, i) in goodsList" :key="i" @click="gotoDetail(item)">
          <!-- 为 my-goods 组件动态绑定 goods 属性的值 -->
          <my-goods :goods="item"></my-goods>
        </view>
    </view>
  </view>
</template>

<script>
  import myGoods from '../../components/my-goods/my-goods.vue'
export default {
  name: 'goodsList',
  components: {
    myGoods
  },
  data() {
    return {
      queryObj: {
        query: '',
        cid: '',
        pagenum: 1,
        pagesize: 10
      },
      // 商品列表的数据
      goodsList: [],
      // 总数量，用来实现分页
      total: 0,
      // 默认的空图片
      defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png',
        // 是否正在请求数据
          isloading: false
    };
  },
  created() {},
  mounted() {},
  onLoad(options) {
    console.log(options);
    this.queryObj.query = options.query || '';
    this.queryObj.cid = options.cid || '';

    this.getGoodsList();
  },
  // 上拉触底
  onReachBottom(){

    // 判断是否还有下一页数据
      if (this.queryObj.pagenum * this.queryObj.pagesize >= this.total) return uni.$showMsg('数据加载完毕！')

    // 通过节流阀状态决定是否发起请求
      if(this.isloading) return ;
      
    // 让页码值自增 +1
      this.queryObj.pagenum += 1
      // 重新获取列表数据
      this.getGoodsList()
  },
  
  // 下拉刷新的事件
  onPullDownRefresh() {
    // 1. 重置关键数据
    this.queryObj.pagenum = 1
    this.total = 0
    this.isloading = false
    this.goodsList = []
  
    // 2. 重新发起请求
    this.getGoodsList(() => uni.stopPullDownRefresh())
  },
  methods: {
    // 获取商品列表数据的方法
    async getGoodsList(cb) {
    
      this.isloading = true;
      // 发起请求
      const { data: res } = await uni.$http.get('/api/public/v1/goods/search', this.queryObj);
      if (res.meta.status !== 200) return uni.$showMsg();
      
      // 只要请求结束，就可以停止下拉加载效果
      cb && cb()
      
      // 为数据赋值
      // this.goodsList = res.message.goods;
      // 将新旧数据进行合并
        this.goodsList = [...this.goodsList, ...res.message.goods]

      this.total = res.message.total;
      this.isloading = false;
    }
    ,
    // 跳转到商品详情页
    gotoDetail(item){
       uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
        })
    }
  }
};
</script>

<style lang="scss">
.goods-item {
  display: flex;
  padding: 10px 5px;
  border-bottom: 1px solid #f0f0f0;

  .goods-item-left {
    margin-right: 5px;

    .goods-pic {
      width: 100px;
      height: 100px;
      display: block;
    }
  }

  .goods-item-right {
    display: flex;
    flex-direction: column;
    justify-content: space-between;

    .goods-name {
      font-size: 13px;
    }

    .goods-price {
      font-size: 16px;
      color: #c00000;
    }
  }
}
</style>
